Suspension jack



April 12, 1932. Hl VAN DYKEN SUSPENSION JACK Filed Oct. 7. '1929Patented Apr. 1,2., 1932.@

PATENT oFFIciE. g

EARRYVAN DYKEN, OFITWO HARBOR/S, MINNESOTA SUSPENSION y JACK 1application med october 7, 1929. serial No. 393,062.

My inventionrelates to jacks and more j especially to suspension'jacksin which the operating parts are below the level of the supportingmember. In the assembling and repairingof heavy vehicles such as railwaylocomotives and the like, it is often necessary to remove and replaceheavy members from the lower'parts Vof. the machine, and the limitedspace prolvided VisV usually insufficient for ordinary types of leversor jacks toassist in these operations. Vhile such work is often donewhile the machine or engine is over a pit this Y 4situation onlyaggravates rather than eases ""the situation. My present invention hasbeen devised and `improved to overcome the diicultiesy met under thesecircumstances and to provide a jack of the suspension type which i. .canbe used in connection with a pit or oor opening,and in which theoperating parts are below the suspension members,kand providing forlifting of heavy objects from av substantially fiat surface. It is anobject of my invention to provide a plane surface.

Another object of myinvention is to provide a jack wherein the operatingparts are below the level of the supporting members. y Another object ofmy invention is to provide a jack adapted to be used in connection withva pit or floor opening.

Further objects and advantages will appear and be brought out more fullyin the *following specification, referencebeing had to the accompanyingdrawings in which- Figure 1 is a side view of a jack embodying myinvention;

Figure 2 is an end view of the same; and Figure 3 is a sectional viewtaken along the lines 3--3 of Figure 1.`

Referring more particularly to the drawings I show a jack comprising abody portion 10, having side plates 11 lwhich are secured "together inspacedv relation by a number of space'bolts 12 and 13. At the top ofside plates 11 are bearing plates 14, which are shown as angle ironmembers and made in- .tegral with sides l1 or suitably secured there-507"to as by bolts 15. Bearing plates 14 provida jack adapted for thelifting of objects fromy I f the elevating member in any desiredposition.

ing` outwardly projecting portions, make possible the suspension of thejack in an aperture 16, in a pit plank 17, which plank may be suspendedacross a pit or other, floor opening suitable for the ydesired use.' Anelevating member 18 is'disposed between plates 11 and, as may be' seenfrom Figure 3is shown as a hollow member andis provided'with a rack 19disposed along one'side and integrally se-Kl cured thereto. A top plate20 is secured to the top of elevating member 18, and has an' extendedportion 21l for insertion into the hollowportion'of member 18, and issecured in place by lock bolt 22.v The pinion 23 mounted on a shaft 24is suitably secured between plates 1l, and is 'Xed to shaft 24 andadapted to rotate lwith it. Pinion'23 isv so mounted as to engage theteeth of rack f 19, so that the rotation of pinion 23 will raise orlower rack 19 and with it top plate 20,' and elevating member 18.` Shaft24 is .provided with la squared portion 25,' to which an operating crankor lever may be attached as desired.V A dog 26 is mounted .on a shaft27, andarranged to engage rack 19 and hold Anarm` 28"@is secured toshaft'27, and has a knoby or handle 29 at its ou'tere'nd.y Bolts y 13areeach provided with afguide roller 30 adapted to guide the elevatingmember 18 and reducethe friction of its movement.

In operation the pit plank 17 is placed across thepit and with the jacksuspended inthe aperture 16 by the supporting `members y14. lVith theelevating member 18 in its lowest position, top plate 20 will rest onbearingV plate 14, and the'locomotive binder' or other parts to beelevated placed on top plate 20. Shaft 24 can then be rotated and, withthe cooperation of 'dog.26, elevating' member 18 can'be raised to andheld at'any position, as will be clear to anyone familiar with this typeof device. To lower the object, member 18 must be first elevatedslightly by-operation -of shaft y24, and the dog26 released from rack19k after which the member 18 can be lowered by the weight of it and itssuperimposedl load. v

From the foregoing it will be apparent ythat this ack is adapted for allpurposes in' which it is desired to lift an object from a plane surfacesuch as a floor, which has a pit or other opening, across which a planksupporting the jack can be placed. The body of the jack and theoperating parts are all below the supporting members, and with suicientspace provided below the supporting members 14, the jack can be easilyandl readily operated as illustrated.

Having described my invention it will" be understood that changes andmodilications in the design and construction of the illustrated devicemay be lnade Without departing from the true scope of lthe invention asset forth in the appended claims;

I claim: A

l. A jack comprising, incombi'nati'ombody' members, supporting memberssecuredy thereto, an elevating member, andy actuating means therefor,said2 supportingmembers being located'adjacei'it the top of said body.

2'. A jack comprising,` in combination, a body"7 portion havingseparated side members, supporting members connected to said sidemembers adjacent the upper portion thereof, an elevating memberdisposed'V betweenv said side members, and actuating means for saidelevatingmember engaging said side' members and'said elevating member.

3. jackk comprising, in combination, spa'ced supporting members, a bodyportionV secured to and supported by said supporting members anddisposed therebelow, an elevating! member in saidA body portion,.mea'nsfor actuati'ngand locking said elevatingmember, anda plurality of rollerguides for said ele- Vati`r lme'mber. n

4'. jack comprising, in combination, a plurality' ofy spaced' supportingmembers, a

ody portion securedtliereto and ,disposed Atlierevbelow,jsaid' bodyportion' having separatedv side" members', ,v an elevating member"having a rack in said body portion, actuating andlockingV meansyengageable with said rack,

and guide members for said ele'vatir'igv member'.

5. A jack comprising, in combination, a plurality of spacedsupportingmembers having a substantially flat upper portion and ado'vvnwardly extending portion, a body portion secured to saiddownwardly extendingk securedy to the top of said elevating member,

portions of the supporting members, an elongated elevating memberdisposed within said body portion,A a rack extending along and securedtoy said elevating" member, a top plate means for actuating and lockingsaid elevating members, and means for guidingv said elevatin member 6.jack comprising, in combination, supporting lmembers having` asubstantially fiat supporting portion and a downwardly extendingportion, a body portion having spacedside members secured to' thedownwardly extending portions of said supporting members, said sidemembers extending below said supporting members, an elevating memberdisposed between said side members, guide bearings therefor, a rackextending along and secured to said elevating member, actuating meansfor said` rack and elevating member comprising, aA pinion carried b saidside members, locking means comprising a dog adapted' to enga "e saidrack, an operating handle' for said 0g, and a top plate secured tosaidfelevatingmembemsaid top plate being adapted to lie substantially inthe lane of saidsupporting members when the e evating member is in itsretracted position.

Signed at;y Two` Harbors, Minnesota, this 26th day of September, -1929.v v

HARRY VAN'y DYKEN

